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Drainfield Trench Product Sizing
NSF/ANSI 240 establishes minimum material, design, construction and performance requirements to evaluate dispersal drainfield products used as alternatives to traditional stone or gravel trenches.
The test procedures emphasize hydraulics and measure performance over time in parallel comparisons between a conventional gravel drain field and a gravelless trench. The standard applies to both newer technologies, which are tested in a laboratory, and technologies in use for 10 or more years, which are evaluated in the field.
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News and Events
NSF International Announces New Southeast Michigan Lab, Expands Plastic Pipe Testing Capabilities
April 16, 2020
Lab opening creates a plastic products testing/certification hub
Clean Water Crusader Joseph Cotruvo Earns 2020 Environmental Health Award From NSF International and NEHA
July 30, 2020
Given annually in honor of NSF International’s co-founder and first executive director, the Walter F. Snyder award recognizes outstanding contributions to the advancement of environmental health.
United Poly Systems Earns First NSF Certification for HDPE Electrical Conduit
July 29, 2020
NSF International certification means products have been evaluated for performance and safety
Louvre Hotels Group Controls Health Protocols in More Than 50 Countries by Enrolling in the Independent "Checked By NSF™" Program, From NSF International
July 24, 2020
After an initial partnership with Mérieux NutriSciences France and the publication of its Health Commitment Charter, Louvre Hotels Group is continuing its "Clean & Safe" health reassurance approach in its international establishments.